Screen or riddle for separators.



N0. 664,8". Patented Dec. 25, I900.

D. LIPPY.

SCREEN OR RIDDLE FOB SEPABATOBS.

(Application filed Sept. 13, 1899.)

(No Model.)

flttorneys.

Thurman Sterne Farnnr rrrcn.

DAVID LIPPY, OF MANSFIELD, OHIO, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE I'JIPPY MANUFACTURING COMPANY.

SCREEN OR RIDDLE FOR SEPARATORS.

SPECIFICATION forming part of Letters Patent No. 664,811, dated December 25, 1900.

Application tiled September 13,1899. Serial No. 730,339. (No model.)

Be it known that I, DAVID LIPPY, a citizen frame. The shafts a at the longitudinal cenof the United States, residing at Mansfield, in ter are each formed into a crank b, which is the county of Richland, State of Ohio, have journaled in a movable bar D, extending lon- 55 invented certain new and useful Improvegitudinallyof the sieve, below the slats therements in Screens or Riddles for Separators; of, and through the medium of which said and I do declare the following to be a full, cranksb are operated to adjust the sieve-slats clear, and exact description of the invention, for purposes hereinafter stated. such as will enable others skilled in the art The slats C of the sieve are formed, pref- 6o 10 to which it appertains to make and use the erably, of thin sheet metal and are provided same, reference being had to the accompanynear their outer or upper edge with a righting drawings, and to the letters of reference angled shoulder 0, extending longitudinally marked thereon, which form a part of this of said slats. Projecting from the lower edge specification. of the shoulder c of each of said slats is a row :5 This invention relates to screens or riddles of teeth e. Said teeth are inclined upwardly for separators; and it consistsin the construcon a plane with the incline of the slats and tion and arrangement of parts hereinafter are adapted to extend onto the surface of the fully set forth, and pointed out particularly slat in advance, as clearly shown in Fig. 4. in the claim. The spaces between these teeth form a mesh 20 The object of the invention is to produce in the slats of the sieve, and by reason of the simple and efficient means for separating all adjustment of said slats through the medium kinds of grain and seeds, the arrangement of the shafts Cb, upon which they are mountbeing such as to evenly distribute the grain, ed, the mesh in the slat-bars may be reguallow of an unobstructed passage of the airlated for the various sizes and conditions of 25 blast through the bars of the sieve, and begrain or seed.

cause of the adjustment of the parts enable The shoulders c of the slats, extending lonthe separating of all kinds of grain or seeds gitudinally thereof, serve to strengthen the upon a single sieve. This object is attained slats and at the same time to check the grain by the mechanism illustrated in the accomas it passes down over the surface of the slats o panying drawings, in whichand distribute it evenly, so that it may be Figure l is a perspective view of a sieve or properly acted upon by the air-blast coming riddle embodying my invention. Fig. 2 is a through the slats from the under side, therelongitudinal section as on line 2 2 of Fig. l. by enabling the air to perfeetlyclean the grain Fig. 3 is a central transverse section through asit passes through the sieve. The shoulders 5 the sieve. Fig. at is an enlarged detail in sec- 0 also serve to raise the straw and chaff uption transversely through the hinged bars of ward from the grain which is arrested by said the sieve, other parts being broken away. shoulders, assisting, in conjunction with the Fig. 5 is an enlarged detail, partlyin section, movement of the sieve, to effectuallyseparate ofthe means employed for adjusting the sievethe straw and chaff from the grain and carry 0 40 bars. them rearwardly over the surface of the sieve. Referring to the letters of reference, A des- The adjustment of the slats of the sieve is ignates the frame of the sieve, which may be accomplished through the medium of ahandof any suitable construction. Dividing the wheel E, supported in a bearing-plate F at sieve-frame through its center is a rail B, exthe rear of the sieve-frame. Extending in- 5 5 tending longitudinally thereof. wardly from said wheel is a threaded stem f, Located upon opposite sides of the central which passes through a tapped boss g in the rail B are the slats C of the sieve, the suryoke H, which is attached to the forward end faces of which stand at a slight incline and of the bar D, whereby by turning said Wheel the lower edges of which are secured to the the stem f is screwed into or out of said yoke I00 50 transverse shafts a, which cross the frame of and the bar I) is moved longitudinally to acthe sieve transversely and the opposite ends tuate the slats of the sieve as required. Upon i To aZZ- whom it may concern: of which are journaled in the side rails of the a portion of the stem f of the wheel E is a polygonal collar G, on which the spring I bears, whereby said wheel is held from turning except when actuated by the operator.

When it is desired to enlarge the mesh of the screen-slats, the wheel E is turned so as to swing the toothed or serrated edges of saidslats upwardly, thereby increasing the space between the teeth of one slat and the surface of the succeeding slat over which said teeth extend. To reduce the mesh of said slats, the

wheel is turned to carry the toothed edges of the slats downwardly, thereby decreasing the space between said teeth and the surface of the slat adjacent thereto.

It will be observed that by forming the shoulders and the teeth upon the upper edge of said slats the air-blast which passes through said slats from the under side is unimpeded,

permitting its unbroken current to act with more force and uniformity upon the grain.

Having thus fully set forth this invention, what is claimed is The combination of a frame provided with a center rail extending longitudinally of the frame, a series of transverse slats, each provided near its outer or upper edge with a shoulder extending longitudinally of said 

